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qul ʾa-raʾaytum ʾin jaʿala llāhu ʿalaykumu n-nahāra sarmadan ʾilā yawmi l-qiyāmati man ʾilāhun ghayru llāhi yaʾtīkum bi-laylin taskunūna fīhi ʾa-fa-lā tubṣirūna
Say, ‘Tell me, if Allah were to make the day perpetual for you until the Day of Resurrection, what god other than Allah can bring you night wherein you can rest? Will you not perceive?’
— Ali Quli Qarai
Surah Al-Qasas - Verse 72
72. “Say: ‘Have you thought, if Allah made the day everlasting for you till the Day of Resurrection, what god other than Allah shall bring you the night in which you rest? Do you not then see?”
The existing system of the world of existence is arranged from the side of Allah, and if He wills He can change it to another system, because the power of Allah is the same unto all beings. This verse refers to the bounty of darkness. It, addressing the Prophet (S), commands him to tell the people of Mecca who were busy worshipping idols:
It is evident that they are not able to answer this question except that they say there is not anyone to do it. Consequently, the argument is completed to them and they must confess that there is not anyone eligible for being worshipped but Allah, the One. Therefore, it says:
That is, do you not obtain knowledge by the way of insight? Do you not observe the day and the night, and do you not contemplate about them so that you know that they both are from the side of a Wise Administrator?